litex/parse/by_stmt/
transitive_prop_by_stmt.rs

1use crate::prelude::*;
2
3impl Runtime {
4    pub fn parse_by_transitive_prop_stmt(
5        &mut self,
6        tb: &mut TokenBlock,
7    ) -> Result<Stmt, RuntimeError> {
8        tb.skip_token(TRANSITIVE_PROP)?;
9        tb.skip_token(COLON)?;
10        if !tb.exceed_end_of_head() {
11            return Err(RuntimeError::from(ParseRuntimeError(
12                RuntimeErrorStruct::new_with_msg_and_line_file(
13                    "by transitive_prop: expected end of head after `:`".to_string(),
14                    tb.line_file.clone(),
15                ),
16            )));
17        }
18        if tb.body.is_empty() {
19            return Err(RuntimeError::from(ParseRuntimeError(
20                RuntimeErrorStruct::new_with_msg_and_line_file(
21                    "by transitive_prop: expects a body".to_string(),
22                    tb.line_file.clone(),
23                ),
24            )));
25        }
26
27        let prove_block = tb.body.get_mut(0).ok_or_else(|| {
28            RuntimeError::from(ParseRuntimeError(
29                RuntimeErrorStruct::new_with_msg_and_line_file(
30                    "by transitive_prop: expected prove block".to_string(),
31                    tb.line_file.clone(),
32                ),
33            ))
34        })?;
35        if prove_block.header.get(0).map(|s| s.as_str()) != Some(PROVE) {
36            return Err(RuntimeError::from(ParseRuntimeError(
37                RuntimeErrorStruct::new_with_msg_and_line_file(
38                    "by transitive_prop: first block must be `prove:`".to_string(),
39                    prove_block.line_file.clone(),
40                ),
41            )));
42        }
43        prove_block.skip_token_and_colon_and_exceed_end_of_head(PROVE)?;
44        if prove_block.body.len() != 1 {
45            return Err(RuntimeError::from(ParseRuntimeError(
46                RuntimeErrorStruct::new_with_msg_and_line_file(
47                    "by transitive_prop: `prove:` must contain exactly one forall fact".to_string(),
48                    prove_block.line_file.clone(),
49                ),
50            )));
51        }
52
53        let forall_block = prove_block.body.get_mut(0).ok_or_else(|| {
54            RuntimeError::from(ParseRuntimeError(
55                RuntimeErrorStruct::new_with_msg_and_line_file(
56                    "by transitive_prop: missing forall block".to_string(),
57                    tb.line_file.clone(),
58                ),
59            ))
60        })?;
61        let fact = self.parse_fact(forall_block)?;
62        let forall_fact = match fact {
63            Fact::ForallFact(ff) => ff,
64            Fact::ForallFactWithIff(_) => {
65                return Err(RuntimeError::from(ParseRuntimeError(
66                    RuntimeErrorStruct::new_with_msg_and_line_file(
67                        "by transitive_prop: forall with `<=>` is not allowed here".to_string(),
68                        forall_block.line_file.clone(),
69                    ),
70                )));
71            }
72            _ => {
73                return Err(RuntimeError::from(ParseRuntimeError(
74                    RuntimeErrorStruct::new_with_msg_and_line_file(
75                        "by transitive_prop: `prove:` must be a single `forall` fact".to_string(),
76                        forall_block.line_file.clone(),
77                    ),
78                )));
79            }
80        };
81
82        let shape_check =
83            ByTransitivePropStmt::new(forall_fact.clone(), Vec::new(), tb.line_file.clone())
84                .transitive_prop_name();
85        if let Err(msg) = shape_check {
86            return Err(RuntimeError::from(ParseRuntimeError(
87                RuntimeErrorStruct::new_with_msg_and_line_file(msg, forall_fact.line_file.clone()),
88            )));
89        }
90
91        let names = forall_fact.params_def_with_type.collect_param_names();
92        let lf = tb.line_file.clone();
93        let proof: Vec<Stmt> = self.parse_stmts_with_optional_free_param_scope(
94            ParamObjType::Forall,
95            &names,
96            lf,
97            |this| {
98                tb.body
99                    .iter_mut()
100                    .skip(1)
101                    .map(|b| this.parse_stmt(b))
102                    .collect::<Result<_, _>>()
103            },
104        )?;
105
106        Ok(ByTransitivePropStmt::new(forall_fact, proof, tb.line_file.clone()).into())
107    }
108}
litex/parse/by_stmt/transitive_prop_by_stmt.rs

litex/parse/by_stmt/
transitive_prop_by_stmt.rs
